patch applied (packages/Cabal): generalise remaining PackageIndex functions over class of pkgs with fixed deps

[Ian Lynagh]

Wed Feb 20 11:51:43 PST 2008  Duncan Coutts <duncan at haskell.org>
  * generalise remaining PackageIndex functions over class of pkgs with fixed deps
  Add a class for packages with fixed deps, like InstalledPackageInfo and
  generalise the few functions that used PackageIndex InstalledPackageInfo
  specifically to use PackageFixedDeps pkg => PackageIndex pkg
  This will be helpful in cabal-install for configured but not-yet-installed
  packages.

    M ./Distribution/Simple/Configure.hs -7 +9
    M ./Distribution/Simple/PackageIndex.hs -24 +32

View patch online:
http://darcs.haskell.org/packages/Cabal/_darcs/patches/20080220195143-adfee-af43b3db4fb9f1e5b4b2404e5e3217ab90c6a09a.gz